When you expand a folder in Windows Explorer and when the vertical scroll bar is present the folder jumps DOWN to the bottom, obscuring the child folders - the very folders one is navigate to see in ALL dialogues used in Windows!
The Background - Additional Information
Microsoft claims this behavior is by design and is working as intended, says Rohit Siddegowda as an Support Engineer.
Method: Open Windows Explorer, click onOrganize > Folder and Search Options > Navigation Pane and enable "Automatically expand to current folder".
Step 1) Expand the navigation directory tree so there are more folders unable to be viewed in the navigation pane, by making the "vertical scroll bar" appear.
Step 2) left click on any folder that contains more child folders (subfolders) than can fit inside the navigation pane view, like "system32" folder.
Step 3) after left clicking on the folder, simply expand the folder so as to see the child folders (subfolders).
Windows Explorer automatically repositions that folder to the bottom of the navigation pane, showing only the first child folder (subfolder) is shown, denying the PC end user from seeing the maximum amount of child folders (subfolders).